Water heater



R. 1.. BLANDING 1,866,078

WATER HEATER July 5, 1932.

Filed June 7, 1929 2 Sheets-Sheet, 1

WATER HEATER Filed June 7, 1929 2 Sheets-Sheet 2 w z i 7 '7 in T; v

. "UNITEDISTATE Patented July 5, 1932' ATER HEATER Ap plication filed June 7,

the art of heat-interchange, and more; particularly to thisart asapplicable-to the utilization of boiler water for producing an abundant supply of hot water domestic purposes. V i

There is a Continually increasing demand for a house heating" system of such nature that it may be eifectivelyjutilized for furnishing at'all timesanlample supply of clean hot water for domestic consumption; In

many cases it-is necessary to provide not only chamber or non secti-onal' boilers, but sectional boilers with attachments effective for producing an;in direct heat interchange between the boiler water and the domestic water supply for bringing such supply to the required temperature; Installations as heretofore provided for this purposefhave been'more or less complicated, expensive, and difficult to install due nections required. g V p In accordance with the present invention, there is provided a combined house heating and domestic waterheating system of 'an' inexpensive nature requiring" a minimum number of connect1ons and operatlng effectively not only to increaselthe efliciency of the boiler itself, but also improving the operation thereof as wellas the effectiveness of the burnerin'stallation utilized for heating the same. a V v In the accompanying'drawings, there are shown for purposes of illustration only, cer-' tain preferred-embodiments of the present invention. V '7 I 'Inthe drawings :V

Figure 1 1s a'partial side elevational view, partly broken away, illustrating more or less diagrammatically one form of install tion i accordance with the present invention, Figure 2 is an end--elevational view of the installation illustrated in Figure 1,

Figure 3 is a detail sectional view on an enlarged scale along the line 111411 of Figure 1, looking in the direction of-the arrows, this figure being partly broken away for purposes of a clearerunderstanding of the structure 1nv0lved;;

Figure l is a view, similar to Figure 1, but

to the number of conm 1929.- Seria1 No.369,226.

illustrating anothervembodiment of the in vention; a a

Figure 5 isadetail sectional view,on an "enlargedscale, along the line V.Vlof Figure 4:, looking in thedirection of'the arrows;and 65 Figure 6 is a detail sectional'view, on an enlarged. scale,'of one of the combinedheaders andwater connecting lines for the indirect heater;v I

In accordance with the embodiment of Figures 1 to 3 of the present invention, there may be provided a boiler 2 of the single or chamber type, operatively supported in the desired relationship to a combustion cham ber..3, eifectivefor'bringing the waterinzthe boiler to the desiredtemperature. f

It a well-known fact that in boiler system's'o f this general character, thehottest water is adjacent the waterline of the boiler and 2, in chain lines. a v a in Disposed'laterallyof the boiler and adj acent'the water level in the water chamber thereof, is a; water; heater 4., This heater; comprises an outer shellof any desired disuch water line being indicated inFigures 1 .70

nensions, having positioned andarranged therein any desired number of tubes 5;, preferably. of copper, having a comparatively high co-eflicient of'heat transfer. As il lusv I trated more particularly in FigureG of the" 30 drawings, the tubes, all of'which areof gen- 1 erally u-shape, as indicated in dottedflines for example, in Figure 4, each have one end secured to a tube platefi below the center line 7 thereof and theopposite endssecuredto the tube plate above the center line; Thetube plate inturn cooperates with the connection 7, havinga central partitiOnS abutting'against the tube plate and forming a header whereby, water entering through the inlet 9 is caused to enter one end of'all of the tubes simultaneously, the water after passing through the tubes being discharged through the outlet connection 10. For the purpose of preventing any trapping of air within the tubes, or within-theheader, the partition8 may be prov vided with a relatively small bleeder or by passopening -11, permitting the free escape of any trapped air. o l

I Cooperating with the heater 4 is'a storage tank 12 for the storage of domestic heating 'water, this tank having an inlet 13 for cold water into the tank. The connections 'de scribed provide a thermo-siphon circulating system of such nature that upon the application of sufiicient heat to ,the tubes 5, there will be maintained atall times a supply of clean hot water in the storage tank 12 available foruse as desired. r p

Heating of the water i the'tubes 5 15 ac- 'compli'shed by indirect heat transfer, the water'for heating purposes beingsupplied dis rectlyfrom the Water chamber of the boiler 2in o the space around the tubes 5 by one or more conne'ctionslf, which servenotonly to admit heating water from the boiler. to the heater, but also todischarge such waterfrom the heater into the boiler after a desired heat transferbetween the boiler Water and the domestic water supply has taken place. This may be accomplished by connections :con-. structedmore particularly asillustrated in Figure 3, which connections are. of such nature that the bottom wall 18: thereof interits highest point. In actual practice it has been found that sucha construction produces n efiicient and contlnuous circulation of boiler water from the Water chamber into and out of the heater a so that a heat transfer is continuously taking place. i

It will be apparent to those skilled in the art that a construction as, described permits the use of connections 18 which-may be easily welded onto the shelled at the desired points and which may be similarly welded directly onto the boiler. This not only, facilitates the manufacture of the heater but also its inlat it being unnecessary to provide a multiplicity of special connections or fittings for the reception ofthe heater;

.1 For venting the Waterspace of the heater 4;,it may be provided witha vent 20 leading into thevapor space of the'water chamber within the boiler;

The connections 17 are preferably located adjacent the Water levelin the boiler for the reason that such water is at substantiallythe highest temperature and therebyefiects a better interchange.

In Figures stand 5 there is illustrated a slightly modified-embodiment of the invention, in jvhich parts corresponding to. the

parts already describedarev designated by the same reference charactershaving, however,

a prime 'afixed thereto. In this embodiment, the boiler 2 is illustrated as comprising a plurality of sections 21 and the heater 4: is shown as having anindividual clrculating connection 17 with each of the sections. The connections 17 difi'er slightly fromthe connections 1 before described with respect to. their upper walls 19",-but the lower walls 18 thereof are disposed substantially in the plane'ofthe bottom of the heater shell l, this construction 1 also roducing a circulation of the character set forth.

7 By connecting the heater 4: to each of the sections 21, the heater serves as an intersectional' circulating means for the various boiler sections, and thereby tends to maintain the water in all otthesections-at substantially the same temperature.' In ordinary sectional'boiler installations, there is no connection betweenthe various sections at or adjacent the water level, so that it ispossible to have a marked'dilference between different sections. In accordance with my invention, the interconnection of the heater to each section precludessucha temperature difierence; In this manner, steaming of the water tivelycoolerwater'is returned to the boiler.

I have found that single circulating connections of the character herein indicated may be utilized to replace the dual connections, heretofore considerednecessary,-if and when the bottom wall of the connections is so disposed as to lie substantially in the plane -would result from an upward movement of the bottom wall of the connections, interferes very materially with the desired circulation,

and any substantially: upward displacement will entirely prevent such circulation'through a single connectionQ v i Thesimplicity of thestructures herein disclosed is such that theymay be readily attached to any existingor new boilerinstallation, with a minimum of labor,'at a minimum cost, and with a minimum number of fittings. This is highly-advantageous inasmuchas in many cases the sale of a domesticwaterheixt ing supply of the general character herein contemplated is prevented'by the fitting requirements of the particular heater. under consideration. 7

Other advantages arise from the utilizationof single connections between the boiler and the heater,which connections serve to of the lower wall of the heater shell insuch manner. as to prevent any pocketing of water provide a water flow therethrough in opposite directions.

While I have herein illustrated certain preferred embodiments of the present invention, it will be apparent that changes in the I specific construction herein illustrated and described may be made without departing either from the spirit of the present invention or the scope of my broader claims.

I claim 1. In combination, a boiler having a water chamber, a Water heater disposed laterally of said boiler slightly below the water level thereof, and a water circulating connection between said chamber and said heater, said water heater being of the type wherein the circulated boiler water acts as a heating medium for the water to be heated in said heater, said connection exclusively communi-' cating with said heater in such manner that the lower portion of the connection is effective for circulating water through the bottom of said heater and serving in itself both as a water inlet and a water outlet for the circulation of water between said boiler and heater, the lower portion of said connection lying in a vplane no portion of which remote from the boiler lies below the point of communication of the bottom of the connection with the boiler. V

2. In combination, a boiler comprising a plurality of sections each having a water chamber, a water heater disposed laterally of said boiler slightly below the water level thereof, and a single opening dual flow circulating connection between each of said chambers and said heater, said water heater being of the indirect type utilizing boiler water as the heating medium, said connections each communicating exclusively with 7 said heater in such manner that the flow through the bottom of the connection is to the boiler.

3. In combination, a boiler comprising a plurality of sections each having a water chamber, a water heater disposed'laterally of said boiler adjacent and slightly below the water level of said chamber, and asingle opening dual flow circulating connection between each of said chambers and said heater,

said water heater being of the indirect type utilizing boiler water as the heating medium, said connections each communicating exclusively with said-heater in such manner that the flow through the bottom of the connection is to the boiler.

In testimony whereof I have hereunto set my hand.

ROBERT L. BLANDING. 

